The study indicated that the several forms of the initial RTST (Eddy Test) was somewhat lacking in internal consistency (there was a Kuder–Richardson Formula 20 value of 21%).
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Studios in October 2011, featuring artwork from Aaron Kuder and cover art by Nathan Fox.
His modesty is perhaps one of the reasons that the generalization of the Kuder-Richardson's (1937) formulation of the coefficient of internal consistency reliability to a continuous case is generally ascribed to Lee Cronbach (1951), even though this generalization was already made a decade earlier (Hoyt, 1941).